I do that too (with Clique). Even as dps I watch the health bars and help out if necessary. It's nice to just right-click (or whatever) on someone's portrait, toss out a PW:S and keep fighting without switching targets.
I like the new option to use default raid frames in a 5-man, so I've been using those lately in favor of grid since I do prefer less addons. Might have to play around with mouseover macros--I can see the appeal there.